Version 1.0 — Published March 2026
Quick Answer
Severe dehydration is a fluid deficit of 10 percent or more of body weight with circulatory compromise — a pediatric emergency with a mortality of 15-30 percent without prompt IV resuscitation. In an 18-month-old with 3 days of watery diarrhea (8 stools/day), vomiting, lethargy, sunken fontanelle, very slow skin pinch, cold peripheries, HR 160, and CRT 4 seconds, follow this 5-step workflow:
- Classify using IMNCI danger signs — lethargy + very slow skin pinch + CRT 4 seconds = severe dehydration with circulatory compromise; trigger Plan C
- Start Plan C IV Ringer's lactate 100 mL/kg — for a child 12 months or above: 30 mL/kg over 30 minutes + 70 mL/kg over 2.5 hours (total 3 hours); for infant under 12 months: 30 mL/kg over 1 hour + 70 mL/kg over 5 hours
- Start low-osmolarity ORS 5 mL/kg/hour alongside IV once the child can drink; WHO ORS composition is 245 mOsm/L with Na 75, glucose 75, K 20
- Give zinc 20 mg/day for 14 days (10 mg/day if < 6 months) — reduces duration by 25 percent and recurrence over 2-3 months by 25 percent
- Withhold empiric antibiotics — antibiotics only for bloody diarrhea (Shigella), suspected cholera, or features of sepsis; continue feeding and breastfeeding
The case
An 18-month-old boy is brought to the pediatric emergency at 2 PM by his mother with a 3-day history of profuse watery diarrhea (8 or more loose stools per day, no blood or mucus noted) and 2 days of non-bilious vomiting (5-6 episodes per day). Over the past 12 hours, the mother reports decreased urine output (only one wet diaper since morning), progressive drowsiness, refusal to feed, and no interest in breastmilk.
The child was born at term via normal vaginal delivery, weight 3.1 kg at birth, exclusively breastfed for 6 months, and is currently on family food with continued breastfeeding. Immunization is complete for age per UIP including three doses of rotavirus vaccine (Rotavac 5D at 6, 10, 14 weeks). Growth has been appropriate — current weight 10.5 kg (pre-illness), height 80 cm, mid-upper-arm circumference 13.8 cm (no severe acute malnutrition). No past history of chronic illness, no previous hospitalization. Family lives in a peri-urban area with municipal piped water; the mother reports a recent community outbreak of diarrhea over the past 2 weeks.
On arrival, his vitals are: pulse 160 bpm (weak, thready), BP 78/42 mmHg (low for age — normal above 90/60 at 18 months), respiratory rate 48/min (tachypneic, deep breathing), SpO2 96 percent on room air, temperature 37.8 C axillary. He is lethargic, opens eyes only to firm stimulus, does not cry vigorously, and shows no interest in breastfeeding. Anterior fontanelle is markedly sunken. Eyes appear sunken with absent tears on crying. Mucous membranes are dry. Skin pinch over the abdomen goes back very slowly (above 3 seconds — tented appearance). Peripheries are cold, mottled, with capillary refill of 4 seconds.
History and examination
Acute watery diarrhea with severe dehydration is the immediate clinical anchor in any infant or young child with 3 or more loose stools per day and classic dehydration signs. In India, acute diarrhea causes 9-13 percent of all under-5 mortality (National Family Health Survey 5, 2020) — most deaths are from dehydration that is recognized late or treated inadequately with plain water or inappropriate home fluids. Rotavirus remains the single commonest cause of severe dehydrating diarrhea in children under 5 despite national vaccine rollout, contributing 20-30 percent of hospitalized cases (ICMR Surveillance Network, 2022). Breakthrough cases after vaccination are milder but still occur.
General examination:
- Lethargic, responds only to firm stimulus (altered sensorium — a danger sign)
- Weight 9.2 kg (down from 10.5 kg pre-illness — 12 percent weight loss, consistent with severe dehydration)
- No pallor, no jaundice, no lymphadenopathy
- No rash (no petechial or purpuric rash to suggest meningococcemia)
Hydration assessment (IMNCI criteria):
| Sign | Finding | Interpretation |
|---|
| Mental status | Lethargic | Severe dehydration criterion |
| Eyes | Sunken | Severe dehydration criterion |
| Skin pinch (abdomen) | Very slow (> 2 sec) | Severe dehydration criterion |
| Ability to drink | Poor — refusing feeds | Severe dehydration criterion |
| Tears | Absent on crying | Supports severe dehydration |
| Mucous membranes | Dry | Supports severe dehydration |
| Anterior fontanelle | Markedly sunken | Supports severe dehydration |
| Urine output | Decreased (1 wet diaper in 12 hours) | Supports severe dehydration |
Four of four IMNCI severe-dehydration criteria are met — only two of four are required to classify as severe.
Circulatory assessment:
- Heart rate 160 bpm (normal 80-140 for 18 months — tachycardia)
- Capillary refill 4 seconds (normal <= 2 seconds — indicates shock)
- Cold, mottled peripheries
- Weak thready pulses (volume depletion with sympathetic compensation failing)
- BP 78/42 mmHg (below 5th percentile for age — late finding; children maintain BP until late in shock)
Respiratory examination:
- Tachypnea with deep respirations (Kussmaul-like pattern suggesting metabolic acidosis from lactate and bicarbonate loss in stool)
- Chest clear to auscultation
- No grunting, no chest indrawing (rules out concurrent pneumonia)
Abdominal examination:
- Scaphoid and slightly distended
- Soft, no rigidity
- Hyperactive bowel sounds
- No hepatosplenomegaly
- No palpable mass (rules out intussusception — red-currant jelly stool also absent)
Neurological examination:
- Lethargic, eye-opening only to firm stimulus (AVPU: responds to Voice with delay, between V and P)
- No focal deficit, no neck stiffness, no bulging fontanelle (rules out meningitis with raised ICP)
- Pupils equal and reactive
Differential diagnosis
Severe dehydration secondary to acute watery diarrhea is the leading diagnosis, but the differential for a lethargic toddler with vomiting, diarrhea, and altered sensorium must be considered before the clinical pattern is fully locked in. The top 6 conditions to rule in or rule out:
| Diagnosis | Points in favor | Points against |
|---|
| Acute watery diarrhea with severe dehydration (likely rotavirus or viral) | 3-day history of watery stools, community outbreak, classic IMNCI severe dehydration signs, Kussmaul breathing | None — all findings consistent |
| Dysentery (Shigella, Campylobacter, EHEC) | Diarrhea + fever in a toddler | No blood or mucus in stool; watery rather than bloody pattern |
| Cholera | Profuse watery stools, hypovolemic shock possible | No history of rice-water stools, no cholera outbreak reported; shock out of proportion to stool volume expected |
| Intussusception | Vomiting, toddler age, lethargy, possible shock | No red-currant jelly stool, no palpable sausage mass, 3-day watery diarrhea is not typical |
| Septic shock (non-GI source) | Shock, lethargy, tachypnea | No fever above 38 C, no focal infection signs, direct GI losses explain volume deficit |
| Meningitis or encephalitis | Lethargy, tachypnea, young child | No fever, no neck stiffness, no bulging fontanelle, no seizures, no rash |
| Diabetic ketoacidosis (DKA) | Kussmaul breathing, lethargy, dehydration | No polyuria/polydipsia history, no family history; diarrhea history explains acidosis — check blood glucose to confirm |
The combination of 3-day watery diarrhea history, classic IMNCI severe dehydration tetrad (lethargy, sunken eyes, very slow skin pinch, poor drinking), 12 percent weight loss, and Kussmaul breathing in a previously well child with community exposure to diarrhea cases clinches the diagnosis: acute watery diarrhea with severe dehydration and hypovolemic shock, likely rotavirus or viral etiology — Plan C IV resuscitation is the immediate management.
Investigations
Investigations should NOT delay Plan C IV resuscitation — fluids are started in parallel with sample collection. Relevant workup for this patient:
- Capillary blood glucose (bedside): 58 mg/dL — mild hypoglycemia (common in prolonged fasting during diarrhea; add dextrose to maintenance fluids)
- Venous blood gas: pH 7.22, HCO3 10 mEq/L, lactate 3.8 mmol/L, base deficit -14 — severe metabolic acidosis (from bicarbonate loss in stool + lactate from hypoperfusion)
- Serum electrolytes: Na 138 mEq/L (isonatremic), K 3.2 mEq/L (mild hypokalemia), Cl 112, anion gap 16
- Renal panel: Creatinine 0.6 mg/dL (elevated for age — normal < 0.4 at 18 months; pre-renal AKI from volume depletion), urea 48 mg/dL
- Hemogram: Hb 11.2 g/dL, WBC 14,800 with neutrophil predominance (can be stress-related, not necessarily bacterial), platelets 380,000
- Stool microscopy: watery stool, no RBCs, no pus cells, no parasites (excludes dysentery and amebiasis)
- Stool rotavirus antigen (ELISA): positive (confirms rotavirus etiology — available in tertiary centers and sentinel surveillance sites; not required routinely for management)
- Blood culture: drawn if signs of sepsis (not mandatory in straightforward severe dehydration)
Investigations confirm rotavirus acute watery diarrhea with severe dehydration, pre-renal AKI, hypoglycemia, hypokalemia, and severe metabolic acidosis. None of these change the immediate management — Plan C resuscitation addresses all four concurrently.
Diagnosis
Acute watery diarrhea with severe dehydration (WHO/IMNCI) and hypovolemic shock, most likely rotavirus etiology, in a previously well 18-month-old boy, with:
- Four-of-four IMNCI severe-dehydration criteria (lethargy, sunken eyes, very slow skin pinch, poor drinking)
- 12 percent weight loss (from 10.5 kg pre-illness to 9.2 kg at presentation)
- Hypovolemic shock (HR 160, CRT 4 sec, cold peripheries, BP below 5th percentile)
- Severe metabolic acidosis (pH 7.22, HCO3 10, base deficit -14)
- Pre-renal acute kidney injury (creatinine 0.6)
- Mild hypoglycemia (58 mg/dL) and hypokalemia (K 3.2)
Management
Severe dehydration management follows four simultaneous streams — they run in parallel, not in sequence. NEET PG tests the parallel protocol, not drug-by-drug recall.
Stream 1: IV fluid resuscitation (Plan C — start within minutes)
The WHO/IMNCI Plan C protocol is the definitive initial treatment. Use Ringer's lactate (preferred) or normal saline if RL unavailable. Total volume: 100 mL/kg IV.
Phasing by age (critical NEET PG point):
| Age group | First bolus (30 mL/kg) | Second infusion (70 mL/kg) | Total time |
|---|
| Infant under 12 months | Over 1 hour | Over next 5 hours | 6 hours |
| Child 12 months or above | Over 30 minutes | Over next 2.5 hours | 3 hours |
For this 18-month-old at 10.5 kg pre-illness weight (use pre-illness weight when available; if not, estimated weight):
- First bolus: 30 mL/kg × 10.5 kg = 315 mL Ringer's lactate over 30 minutes
- Second infusion: 70 mL/kg × 10.5 kg = 735 mL Ringer's lactate over the next 2.5 hours
- Total: 1050 mL over 3 hours
Reassess after each 30 mL/kg bolus:
- If no improvement in pulse, CRT, or mental status → give a second 30 mL/kg bolus over 30 minutes (same rate)
- If still no improvement → consider second IV access, inotropic support, and evaluate for alternative diagnoses (septic shock)
- When the child can drink → start ORS 5 mL/kg/hour in parallel with IV
If IV access fails after 2 attempts or within 5 minutes → intraosseous access (proximal tibia 1 cm below and medial to tibial tuberosity; distal femur; distal tibia) or nasogastric ORS at 20 mL/kg/hour until IV access is established.
Glucose correction: This child has hypoglycemia (58 mg/dL). Give 2 mL/kg of 10 percent dextrose IV bolus (= 21 mL of D10 for 10.5 kg) BEFORE or DURING the Ringer's lactate bolus. Alternatively, add 5 percent dextrose to the Ringer's lactate infusion.
Potassium correction: Once the child is passing urine, add KCl 20 mEq/L to the maintenance IV fluid (not the initial bolus — bolus potassium can cause cardiac arrest).
Stream 2: Oral rehydration with low-osmolarity ORS (start as soon as child can drink)
ORS is not replaced by IV fluids — it runs in parallel once oral intake resumes. Low-osmolarity ORS composition (WHO/UNICEF revised 2002):
| Component | Concentration | Function |
|---|
| Sodium | 75 mmol/L | Replaces stool sodium loss (25-90 mmol/L) |
| Potassium | 20 mmol/L | Replaces stool potassium loss (15-30 mmol/L) |
| Chloride | 65 mmol/L | Electrical neutrality |
| Citrate (trisodium) | 10 mmol/L | Alkali precursor (corrects acidosis) |
| Glucose | 75 mmol/L | Drives Na-glucose co-transport (SGLT1) → water absorption |
| Total osmolarity | 245 mOsm/L | Lower than plasma (285) — drives water absorption |
Once the child can drink (typically after the first 30 mL/kg bolus), start ORS 5 mL/kg/hour by spoon or cup in parallel with continuing IV fluids. Increase ORS gradually as IV requirement decreases. Continue ORS at 10 mL per stool passed until diarrhea resolves.
The glucose-to-sodium ratio is 1:1 in low-osmolarity ORS — this is the critical principle. Sodium-glucose co-transport (SGLT1) at the enterocyte apical membrane pulls water across even during secretory diarrhea when other absorption mechanisms are paralysed. The reduction from 311 mOsm/L (old ORS) to 245 mOsm/L (low-osmolarity) reduces stool volume by 25 percent and vomiting by 30 percent (Cochrane review, 2002), without causing hyponatremia.
Stream 3: Zinc supplementation (start as soon as child tolerates oral intake)
Zinc is WHO-recommended for all children with acute diarrhea for 14 days continuous:
| Age | Dose | Duration |
|---|
| Under 6 months | 10 mg/day (half tablet of 20 mg dispersed in breastmilk or water) | 14 days |
| 6 months and above | 20 mg/day (one dispersible tablet) | 14 days |
Four proven benefits: reduces diarrhea duration by 25 percent, reduces stool volume by 30 percent, reduces recurrent episodes over the next 2-3 months by 25 percent, and reduces mortality in zinc-deficient populations (Cochrane, Lancet meta-analyses). Mechanism: restores enterocyte integrity, enhances brush-border enzymes, improves immune function. The 14-day course is non-negotiable — shorter courses do not deliver the recurrence-prevention benefit.
Stream 4: Feeding, supportive care, and antibiotic decision
- Continue breastfeeding throughout — do NOT stop during diarrhea. Breastmilk provides fluids, electrolytes, energy, and immune protection.
- Resume age-appropriate diet once vomiting settles (usually within 6-8 hours of fluid resuscitation). Bland, semi-solid, easily digestible foods: khichdi, dal, curd, banana, mashed potato, rice with ghee.
- Avoid: sugary drinks (soft drinks, fruit juices > 1:1 diluted — high osmolarity worsens diarrhea), full-strength cow's milk if lactose intolerance develops (temporary — resume after 48 hours).
- No antidiarrheals — loperamide is CONTRAINDICATED in children under 2 years (toxic megacolon, ileus, CNS depression risk).
- No empiric antibiotics for watery diarrhea — most acute diarrhea is viral (rotavirus, norovirus). Antibiotics only for:
| Indication | Antibiotic choice |
|---|
| Bloody diarrhea (dysentery — Shigella) | Ciprofloxacin 15 mg/kg BD × 3 days OR azithromycin 10 mg/kg OD × 3 days |
| Suspected cholera (large-volume rice-water stools, endemic area) | Azithromycin 20 mg/kg single dose OR doxycycline (if > 8 years) |
| Amoebic dysentery (hematochezia + trophozoites on microscopy) | Metronidazole 10 mg/kg TDS × 7-10 days |
| Severe dehydration with features of sepsis | Ceftriaxone 80 mg/kg OD IV + supportive care |
| Immunocompromised child | Broad-spectrum per institutional protocol |
This child has non-bloody watery diarrhea with no sepsis features — no antibiotics indicated. Antibiotic misuse for viral diarrhea prolongs Salmonella carriage, accelerates resistance, and does not shorten illness.
Stream 5: Rotavirus vaccine — primary prevention
India's Universal Immunization Programme (UIP) includes Rotavac 5D (indigenous live-attenuated oral rotavirus vaccine, approved by WHO prequalification in 2018) at 6, 10, and 14 weeks co-administered with pentavalent (DPT-HepB-Hib) and OPV. Safety windows: first dose before 15 weeks of age, last dose by 32 weeks — this reduces the theoretical intussusception risk window. Post-introduction surveillance (NPSU, 2016-2023) shows a 25-30 percent reduction in hospitalizations for rotavirus gastroenteritis in children under 5.
This child was fully vaccinated — breakthrough disease occurs but is typically milder. The rotavirus vaccine prevents 70-85 percent of severe episodes, not 100 percent. Continue to counsel the family on handwashing, safe water, food hygiene, and breastfeeding — rotavirus transmission is fecal-oral and hygiene remains the primary preventive measure alongside vaccination.
Explore more pediatrics high-yield topics, review the NEET PG pediatrics high-yield topics guide for exam-focused concept maps, and contrast this case with the child with recurrent seizures — West syndrome case to strengthen pattern recognition across pediatric emergencies.
How NEET PG tests acute childhood diarrhea and dehydration
Acute childhood diarrhea appears in 2-3 NEET PG questions per paper across pediatrics and PSM, tested through five dominant patterns:
Pattern 1 — The IMNCI classification question: A vignette gives a child with diarrhea and specific clinical findings. You must classify as no/some/severe dehydration. Trap: mixing up "some" (2 of 4 including restless/irritable, sunken eyes, thirsty, slow pinch) with "severe" (2 of 4 including lethargic, sunken eyes, poor drinking, very slow pinch).
Pattern 2 — The Plan C fluid schedule question: Given age and weight, calculate total volume (100 mL/kg) and phasing. Trap: applying the adult/child schedule (30 + 70 over 3 hours) to an infant under 12 months who needs the slower 6-hour schedule.
Pattern 3 — The ORS composition question: Identify the low-osmolarity ORS components by values (Na 75, K 20, glucose 75, citrate 10, total 245 mOsm/L). Trap: old ORS values (Na 90, glucose 111, total 311) that are no longer recommended.
Pattern 4 — The zinc dosing question: Correct dose (20 mg/day for 6 months and above, 10 mg/day under 6 months) and duration (14 days). Trap: answer options with 7-day or 10-day durations.
Pattern 5 — The antibiotic-indication question: Which type of diarrhea needs antibiotics? Watery = no antibiotic. Bloody = Shigella-cover antibiotic (ciprofloxacin or azithromycin). Rice-water = cholera-cover (azithromycin or doxycycline). Trap: prescribing antibiotics for all severe dehydration.
High-yield one-liners for last-day revision:
- IMNCI severe dehydration = any 2 of 4 (lethargy, sunken eyes, poor drinking, skin pinch very slow > 2 sec)
- Plan C fluid = Ringer's lactate 100 mL/kg; phasing 30 + 70 mL/kg (timing differs by age)
- Low-osmolarity ORS = 245 mOsm/L, Na 75, glucose 75, K 20, citrate 10 (G:Na ratio 1:1)
- Zinc 20 mg/day × 14 days (10 mg if < 6 months); reduces duration 25 percent, recurrence 25 percent
- Continue breastfeeding throughout diarrhea — NEVER stop
- Antibiotics only for: bloody diarrhea, suspected cholera, sepsis features
- Loperamide CONTRAINDICATED in children under 2 years
- Rotavirus vaccine (Rotavac 5D) at 6, 10, 14 weeks; first dose by 15 weeks, last by 32 weeks
- Danger signs requiring IV = lethargy, inability to drink, persistent vomiting, convulsions, very slow pinch, cold peripheries, deep breathing, diarrhea > 14 days
Frequently asked questions
How does WHO/IMNCI classify dehydration in children under 5?
IMNCI uses three categories based on clinical signs. Severe dehydration requires two of: lethargic or unconscious, sunken eyes, not able to drink or drinking poorly, skin pinch goes back very slowly (above 2 seconds). Some dehydration requires two of: restless/irritable, sunken eyes, drinks eagerly/thirsty, skin pinch goes back slowly. No dehydration means none of the above. This classification drives fluid plan selection — Plan A (home ORS) for no dehydration, Plan B (supervised ORS 75 mL/kg over 4 hours) for some dehydration, Plan C (urgent IV fluids) for severe dehydration. WHO 2013 endorses this assessment as the primary bedside triage tool.
What is the WHO Plan C IV fluid protocol for severe dehydration?
Plan C uses Ringer's lactate 100 mL/kg IV infused in two phases, with the phasing based on age. For infants under 12 months: 30 mL/kg over the first hour, then 70 mL/kg over the next 5 hours (total 6 hours). For children 12 months or above: 30 mL/kg over the first 30 minutes, then 70 mL/kg over the next 2.5 hours (total 3 hours). Reassess every 1-2 hours — if pulse and perfusion do not improve after the first bolus, give a second 30 mL/kg. Once the child can drink, start ORS 5 mL/kg/hour in parallel. If IV access fails, use intraosseous or nasogastric ORS at 20 mL/kg/hour.
What is the composition of low-osmolarity ORS and why was it changed?
WHO/UNICEF low-osmolarity ORS (revised 2002) contains sodium 75 mmol/L, potassium 20 mmol/L, chloride 65 mmol/L, citrate 10 mmol/L, glucose 75 mmol/L — total osmolarity 245 mOsm/L (vs old ORS at 311 mOsm/L). The reduction was driven by Cochrane and WHO evidence that lower osmolarity reduces stool volume by 25 percent, reduces vomiting by 30 percent, and cuts unscheduled IV fluid needs by 33 percent without causing hyponatremia. Glucose-to-sodium ratio is 1:1 — this co-transport mechanism (SGLT1) drives water absorption even during cholera-like secretory diarrhea when the gut is otherwise paralysed.
Why is zinc given for 14 days in childhood diarrhea?
Zinc 20 mg/day (10 mg for infants under 6 months) for 14 days is WHO-recommended adjunct therapy. Four evidence-based benefits: reduces diarrhea duration by 25 percent (Lancet meta-analysis 2008), reduces stool volume by 30 percent, reduces recurrent episodes over the following 2-3 months by 25 percent, and reduces all-cause mortality in zinc-deficient populations. Mechanism: restores enterocyte brush-border integrity, improves water and electrolyte absorption, enhances immune function. 14 days of therapy is critical — shorter courses do not deliver the prevention benefit for recurrent episodes. India's National Diarrheal Disease Control Program includes zinc in every diarrhea treatment kit.
When should antibiotics be used in acute childhood diarrhea?
Antibiotics are NOT routinely indicated — most acute watery diarrhea is viral (rotavirus, norovirus) and self-limiting. Four specific indications: bloody diarrhea (dysentery — likely Shigella; give ciprofloxacin 15 mg/kg BD for 3 days or azithromycin 10 mg/kg OD for 3 days), suspected cholera (large-volume rice-water stools in a cholera-endemic area; give azithromycin or doxycycline), severe dehydration with features of sepsis, and immunocompromised children. Amebiasis (amoebic dysentery or liver abscess) requires metronidazole. Empiric antibiotics for non-dysenteric watery diarrhea are harmful — they prolong Salmonella carriage, promote resistance, and do not shorten illness.
How effective is rotavirus vaccine and when is it given?
Rotavirus vaccine prevents 70-85 percent of severe rotavirus diarrhea episodes and 40-60 percent of all severe diarrhea in vaccinated children. India's Universal Immunization Programme (UIP) includes Rotavac 5D (live-attenuated, oral) at 6, 10, and 14 weeks of age — co-administered with pentavalent (DPT-HepB-Hib) and OPV. The first dose must be given before 15 weeks and the last by 32 weeks (WHO safety window to minimize intussusception risk). India introduced rotavirus vaccine nationally in 2016 — post-introduction surveillance shows a 25-30 percent reduction in rotavirus hospitalizations in children under 5. Rotavirus is the single commonest cause of severe dehydrating diarrhea globally, killing about 200,000 children under 5 annually pre-vaccination era.
What are the danger signs that mandate IV fluids in a child with diarrhea?
Eight IMNCI danger signs mandate IV resuscitation and hospital admission. First, lethargy or loss of consciousness. Second, inability to drink or breastfeed. Third, vomiting everything (persistent vomiting that prevents ORS). Fourth, convulsions during current illness. Fifth, very slow skin pinch (above 2 seconds — severe dehydration). Sixth, cold peripheries with capillary refill above 3 seconds (shock). Seventh, tachypnea and deep/acidotic breathing (suggesting severe metabolic acidosis). Eighth, persistent diarrhea above 14 days duration. Any one danger sign requires immediate Plan C IV resuscitation plus evaluation for other serious conditions (sepsis, meningitis, severe acute malnutrition).
How is childhood dehydration tested in NEET PG?
NBE tests pediatric diarrhea through five patterns: IMNCI classification of dehydration (no/some/severe based on skin pinch, eye status, mental state, drinking pattern), Plan C IV fluid schedule by age (30 mL/kg + 70 mL/kg with different phasing for under 12 months vs above 12 months), low-osmolarity ORS composition (245 mOsm/L, glucose:sodium 1:1), zinc supplementation dose and duration (20 mg/day for 14 days, 10 mg if under 6 months), and indications for antibiotics (dysentery, cholera, sepsis). Expect 2-3 diarrhea questions per NEET PG paper in the pediatrics and PSM sections, often testing integrated decision-making across severity assessment, fluid choice, and adjunct therapies.
This content is for educational purposes for NEET PG exam preparation. It is not a substitute for professional medical advice, diagnosis, or treatment. Clinical information has been reviewed by qualified medical professionals.
Sources and references
- WHO and UNICEF, "Clinical Management of Acute Diarrhoea" (WHO/UNICEF Joint Statement, 2004; updated WHO Pocket Book of Hospital Care for Children, 2nd Edition, 2013) — global standard for IMNCI classification, Plan A/B/C fluid protocols, and low-osmolarity ORS composition.
- Ghai's Essential Pediatrics, 9th Edition (CBS Publishers, 2019) — Indian standard textbook with detailed chapters on acute gastroenteritis, dehydration assessment, and the National Diarrheal Disease Control Program.
- Lazzerini M, Wanzira H, "Oral zinc for treating diarrhoea in children," Cochrane Database of Systematic Reviews, 2016 — meta-analysis demonstrating zinc reduces duration, stool volume, and recurrence in childhood diarrhea.
Strengthen your pediatric emergency pattern recognition by working through dehydration, seizure, and respiratory distress vignettes. Review the pediatrics subject page, deepen seizure-focused reasoning with the child with recurrent seizures — West syndrome clinical case, and drill targeted pediatric MCQs on the NEETPGAI practice platform. Ready for unlimited AI-powered MCQs with detailed explanations? Explore NEETPGAI Pro.
Written by: NEETPGAI Editorial Team
Reviewed by: Pending SME Review
Last reviewed: March 2026
This article is reviewed by qualified medical professionals for clinical accuracy and exam relevance. For corrections or updates, contact the editorial team.
